Same chapter4 marksDifficulty: Hard
In a circle with centre O, AB is a diameter and C is a point on the circle. If angle CAB = 35°, find angle ACB and angle ABC.
Circles
4 marksDifficulty: Hard
In a circle with centre O, chord AB is produced to a point P outside the circle, and PT is a tangent from P touching the circle at T. If PA = 5 cm and AB = 7 cm, find the length of PT.
Original Khojo Papers practice question — not from a past board paper.
Answer
PT = 2√15 ≈ 7.75 cm
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
PB = PA + AB = 12 cm. By the tangent–secant relation PT2 = PA × PB = 5 × 12 = 60, so PT = √60 = 2√15 cm.
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